Re: byte-compile-nogroup-warn effectively disabled

[Richard M Stallman]

    Sorry, I haven't followed this. But IIUYC, I think it would be a mistake to
    automatically assign an option or face the group that was last specified 
before
    it in the same file.

    What for? What is gained? Sounds like an invitation for user errors that 
won't
    necessarily be noticed right away. It might not be an important error to 
assign
    the wrong group, but why encourage that possibility?

That is what I feel, too.  Omitting the :group is no big savings in
effort; writing it gives you a chance to think about it.